Fuse for projectiles



July 2s, 1925. 1541x593Y w. l.. LUKENSET AL FUSE F'OR PROJECTILES Filled sept. 20.11922 3 sneecs-Shea@l '1 .Q Kaz July 28., 1925. n

a V.V. LLUKENs ET AL 1,547,598

FUSE FOR PROJECTILES Filed sept. 2o. i922 1 Y 5 sheets-sheet a luf/4 'l //7/////////// July 28, 1925.

W. L. LUKENS ET AL FUSE FOR PROJECTILES vFiled Sept. 20, 1922 5 Sheets-Sheet '5 49 has a cylindrical Vfiange surface of the block 15. Normally a valve 29 is so adjusted that the conduit 25is'not in communication withV the branch conduit 27.

Valve 29 is a rearwardly extending conical `projection on screw plug 30V which has threaded engagement with the correspondingly threaded inner wall of an axial recess in the block 15 and-opening through its forward end. The stem 31 of the screw plug 30 is received within an aperture in the inner end of a 'stem or rod 32 and is pinnedl thereto. Rod 32 is arranged axiallyV within the nose andY extends forwardly through an axial aperture in the point' of the nose. The axial aperture is provided with 'slots 33 and slidably fitting within these slots are lugs 34 3 Nut 35 has a squared aperture 36 and fits closely around the squared shank 37 of rod 32. The adjusting nut isV maintained in the position in which it is illustrated in Figure 1 by means of a spring 38 the inner end of which pressesV on the adjusting nut and the outer end of which abuts against a spring retaining nut 39 secured on the end of a spindle 40 projecting from rod 32.` A

The branch duct 26 leading Afroin the axial duct 25 in the primer carrier communicates with a chamber 41. containing a `delay powder pellet, which chamber is inv turn' in communication with a second chamber 42 containing-flash powder, and the second chamber opens tothe rear of the prim-er carrying block through an Vaperture `43.

The firing Vpin carrying'bloclzl supports a disk-45 which'disk is secured in the faceV 40 being integral therewith.

the firing pin 23 Disk 45 is provided with apertures or conduits-46 leading inwardly and rearwardly and-opening into of the carrier j block- 16,

an axial chamber 47 containing-a magazine Chamber l47 has charge of flash powder. extending rearwardly therefrom an axial channel -48 which not onlypasses through the rear end ofthe firing pin'carrier block 16 but valso through a transverse bottom plug 49 which is Vthreaded-into the rear of the axial recess in head 13. Bottom plug 50 extending rearwardly therefrom the outer wall of this flange fitting closely against "the inner wall of a cavity in the forward end of base 14 of the fuse.

The cylindrical Vflange 50 of the bottom plug and in advance of the Vcircular face 51 of the fuse'body, contains the centrifugal Vshutter 52 which holds the detonating charge 53, as shown clearly in' Figures 2, 4, 6, 7 and 8. Referring particularly to Figures 7 and 8 it will be-seenfthat the shutter 52 is pivoted to swing about a screw'54, between the side of an adjusting nut Y vbe seen, the valve 29 obstructs 4wardly vso ,long as the other.

chamberv within the.

`tile Von the target the firing 'disk 45' and the primer holder 65 are wall of the containing cavity and a-stop pin 55. The shutter is generally segmental in shape and is normally held in theposition in which it is shown in Figure 7, by means of a spring pressed plunger 56. In such position the fulminate detonating charge 53 is eccentric to the axis `of the shell and not in a position to communicate with either the axial passage 48 leading forwardly to the flash powder charge 47, or with the axial passage 57 leading rearwardly to the chamber 58 which contains theA boosting charge of the fuse. Shutter 52 is held in this position by means` of a plunger or inertia bolt 59 which isV normally pressed forward by a spring 60 into an aperture 61 in the 'rear yside of the bottom plug 49. The inertia bolt 59 is also adapted to enter an aperture 62 and to lock the detonator shut- 'ter in the position shown in FigureV 8, in

which the fuse is armed.

Normally the fuse is adjusted for delay action, as shown in Figure 1. Here, it will communication between branch conduit 27 and conduit 25. Y.At the moment of firing the inertia of the moving parts of the fuse causes them to exert a force on the parts immediately in their rear during acceleration of the projectile. 'Ihus the primer carrying block 15 presses against lthe centrifugal bolts 17 and prevents them from moving radially outprojectileV is being acceleratedfand hence prevents prematurecontact of the ring pin and primer and explosion of 'the projectile. lVith the cessation of acceleration, however, the centrifugal safety bolts 17-iy outwardly and no longer oppose movement lof the firing pin and Vprimer carrying blocks toward each Initial acceleration ofthe 'projectile also causesthe inertia bolt 59 to move rearwardly against the action of the spring60 and to withdraw from recess 61. Initial rotation of the'projectile occurs while pin'59 is thuswithdrawn and hence the shutter 0r detonator carrier 52 is free toA be moved laterally by centrifugal action into the position in which it is illustrated in Figure 8. When this position is reached and acceleration has ceased, inertia bolt 59 moves forwardly into recess 62 and the 'shutter is thus locked in this position, with the fulminate charge 53A in position to be ignited by a flame from the flash powder charge 47.

Upon impact of the nose Vof the projecpin carrying block 16 flies forwardly and the firing pin 23 fires the primer 22. If the point of the firing pin pierces the wall'of the primer, gas will have a tendency t0 escape rearwardly and to prevent this the firing pin provided Vwith interlocking Vflanges 66 andV 67 ing an impact fuse therein,

uis

non-rotatably mounted'. on said spindle, spring means normally holding said nut in engagement with the projectile Wall, the nut and project-ile having interengaging portions whereby said nut, and hence the spindle is normally locked against rotation, said nut beingV adapted to be moved longitudinallyA upon'the spindle, against the action of the spring, to disengage the projectile so that the spindle may be turned, and toreturn to locking position when released.V

5. In a fuse, the combination of a body having a` head with an axial opening therein, a chamber inthe body communicating with the opening, a carrier member inthe forward portion of the chamberY and adapted to move therein, a primer atthe rear side ofsaid carrier member, a projection carried by the carrier member and extending through said opening, a second carrier member disposed inthe rearward portion of said chainber, and a firingpin at the forward side of the' second carrier member, said tiring pin and second carrier member being adapted to move forwardly in the chamber upon impact to engage the pin withthe primer.

6. In a fuse, the combination of'aV body having a head provided with an axial opening, a chamber in the body communicating with the opening, forward and rearward blocks disposed Yin the chamber and capable a projec-.

of movement with respectlthereto, tion carried bythe forwardvside of the forward block and extending through Isaid opening, Va primer carried by the rearward side of the forward block, a firing pin carried. by the forward side 'of the rearward block, anti-creeper-'means disposed Ybetween the blocks, and means forspacing the blocks and-responsive to centrifugal force to jmove outwardly to permit relative approaching movements of the blocks;

7. The 'combination with a projectile havprovided with an axial recessat one end to receive a fuse part,.said anticipator extending through an aperture in the projectile point and capable of rotation with respect thereto, and releasable locking means forV preventing rotation of the anticipator with respect to the projectile.

8. The combination, vwith a hollow projectile adapted to contain an explosive charge and having an aperture at its point, of a fuse within the projectile comprising a head portion having an opening therein, and 'control means for the fuse extending `through th opening in the head portion and through the aperture.

9. The combination, with a hollow projectile adapted to contain an explosive charge and having an aperture at its point, of a fuse within the projectile comprising a head portion having an opening therein,

.control means for the fuse extending through charge,

from delay to non-delay,

`means carried by of an anticipa-tor l lmember having a longitudinal bore, a primer saidvalve having a Yprojectile and including extending forwardly of the point of the projectile,

l0. lThe combination with a hollow projectile adapted to contain an explosive of an adjustable fuse entirely enclosed within the wall of said projectile, means for changing from without. the action of said fuse from delay to non-delay, or vice versa, comprising a spindle' connected to the fuse and extending through an aperture in the wall of the projectile, and an anticipator adapted to be secured to said spindle.

l1. The combination with a hollow projectile adapted to containV an explosive charge, of an adjustable fuse entirely enclosed withinthe'wall of said projectile, and means operable externally of the projectile for changing the action of said fuse or Vice versa, coinprising a spindle connected to the fuse and extending through an aperture in the wall of the projectile.

12. In a fuse, the combination of a head member having a longitudinal bore, a primer carrier arranged at the forward portion of the bore, a firing pin carrier arranged at the rearward portion of the bore, a primer charge carried at the rear side of the primer carrier and in alignment with the iii-ing pin, slowand quick action flashing the primer carrier and including passageways communicating with the primer charge, 'a valve for opening and passageway of the quick action flash means, saidvalve'beingcarried by the primer charge carrier and extending beyond the forward end thereof, and means for spacing the carriers and responsive to centrifuga-l force to allow'one carrier to move toward the other.

13. In a. fuse, the combination of a head closing the carrier arranged at the forward portion of the bore, a firing pin carrier arranged at the rearward portion ofthe bore, a primer chargecarried at the rea-r side of the primer carrier and in alignment with the ring pin,

kslow and quick action flashinglmeans carried by the primer carrier and including passageways communicating with the primerv charge, a valve having athreaded connection with respect to the primer carrier and movable with respect thereto to open and close the passageway of the quick action flash means,

projection extending beyond the forward end of the fuse, and means for spacing thecarriers and responsive to centrifugal force to allow one carrier to move toward the other.

lll.v The combination with a hollow projectile, of a fuse completely enclosed by the a head member havngadongitudinal bore',y a primercarrier' 47arrangedat they forward portion lof the ;bore,' fifa; `:firingj oincarrier arranged at the rearward portion of they bore,

yrear' sideof thev primer carrier and aligned v withxthe ring pin, quick and delay action {flashcharge means carried by .the primerV 'carrier and including"passagewayaa valve, yfor openingfand' closing the passageway lofvof the quick action flash means', said-valve beingcarried byfthe primer charge carrier {andhaving Vav projection extending lforwardly hereof, a stembonnected to .theV Valve-proff .jectionand extending through they nose end y I1-of the' projectile, means carried by the stem andk accessible 'exteriorlyvofjthe projectile or close ltlleyalve, and means for u spacing ,f fthe carriers and responsive to 'centrifugal force to allowone carrier to 'move `toward thefother.

"jectileQo'f a fuse completely enclosedby-the' ing 'aj longitudinal bore,v fa. primer-Q carrier arranged ratv the Yforward portionof. the,bore,' afring pin carrier arrangedV at th'ejrear- 'at ftheirear Side of the. primer carrier andaligned with the action'j'lash charge means jvalye for vopening and v closing j the 'quick "threaded to the V.prinie'r carrierz andfhaving thefprojeaile nection,` between *othen afprimer charge atfthev Y side ofthe lprimer fearrier, a.V Hash dharge primerv charge,

and behind whereby the stem mayV be; operatedV to open iirst'carrier( I A'15. The combination aihollow.pro-v y projectileand including ahead member hav-j;l

v'ber at tlieforwardendthereof, and n n'eans.;A i f Vextending through j' said opening 1an'l ward i portion fof the! bore; Ja v,prii'ner v'charg'ei fing pia-wicked delay@ i .o o i fcarried byythe noseiportions 'connected by;v Van` interior yprimercarrierand'including,passageways,`ai,

' ingat its pointrofraffuse offthegdelaygand' action flash passageway,f`said Valve being,V

.f a projection extending forwardly of the/fuse; Y astem connectedto theQprojection-'a'ndeig-f vrtending"through Va recess fatthe nose en'df'ofl aV releasable interlocking lconthe projectile*andtheistemf' means" forv releasing the interlocking con-1f,l s f nection and for turning thestem toopenror close;the-Valve, and means for spacing'the carriers and responsive toicentrifugal forceV y tofallowv one carrier toV moveftoward,theV 45e;

' f al vuse, v.the combination lofvjfa head` member havinga longitudinalbore, .acarjf' Vrier in thebore, a primer charge at-the'rearjr nrier lcommunicatingv with the VHash"'chargeivr 2 il land Vleading to the rear faceof the carrier,4 a delay chargel in oneof the passageways,

a valve for opening and closinglthe other passageway, a second carrier? in ythejbore the iirst carrier', a lirifngV :carried by the second Acarrierfand inialign-jf; ment with the primer cliarge,`V and passage-v Ways in the second'icarrier in opposed rela. tion with respect'to the passageways in {the 17. The combination,Y with Ja' holl'owpro j'ectileinclud'ing detachable-hollow body and nose portions and the 'nose` portion -hayingan'opeiiiiig its point,'fof a Vfuse" disposed inthe projectile and h'aVin-g a controlinem-f nectedto the controlnieinher.v` j

"18..The combination,with 'hollow-:pro jeaiieinciuding Separate.; hollow bodyfand l Ythreaded ring 'andthe.nose havingfanlopen"- Aquick'action typesupportedby thev ringing' teriorl'y of the projectile,{and5means Ae'XfTlCl-fA ing forwardly yoftliei'use and tliroughsaid. opening 'for f setting "the fuse for Y`,delay` on quickaction.V i [11;9 In testimony wh'neofl VWefflier eunto aiiix' our signatures i' JOHN A. TAYLORY ROBERT fRaIGAREY- 

